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    Author(s): J.L. Michael
    Date: 1983
    Source: In: Proceedings, 36th Annual Meeting Southern Weed Science Society; 1983 January 18-20; Biloxi, MS. [Champaign, IL]: Southern Weed Science Society. 218-221.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (34 KB)

    Description

    Four new chemicals and Velpar L (R) were applied at several rates to loblolly pine (Pinus taeda L.) seedlings ranging in age from approximately 1 month to 3 years. Of the chemicals applied (Oust(R) to 3 years DPX-6376, and Velpar L from DuPont. Lontrel(R) from Dow; and EL-187 from Eianco), EL-187 and velpar L caused significant pine mortality. In greenhouse studies, EL-187 killed 1 year old loblolly pine at all rates tested (l-4# ai/a). In field tests on 3 year old loblolly, 2 and 4# ai/a resulted in 100% mortality.

    Velpar L applied to 1 month old and 1 year old (since planting) loblolly tubelings at 2# ai/a resulted in 46% and 1% mortality respectively.

    Lontrel, Oust and DPX-6376 appear safe on pine at rates up to 2, l/4, and 1/4# ai/a respectively regardless of pine age. Oust and DPX-6376 appear safe on 1 year and older pines at rates up to 2# ai/acre. All three of the above appear safer on pine than Velpar L at effective herbicidal rates.

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    Citation

    Michael, J.L. 1983. Pine Tolerance to Several New Herbicides. In: Proceedings, 36th Annual Meeting Southern Weed Science Society; 1983 January 18-20; Biloxi, MS. [Champaign, IL]: Southern Weed Science Society. 218-221.

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